Bolts having indicators
OwnerS. E. Yandle, IIinventor
Life of this patent
Estimating the term…
Abstract
A bolt includes a movable pin in the center thereof. This pin can freely move up and down in the bolt. If the pin protrudes out of bolt a predetermined distance after the bolt is screwed into a blind bolt hole, then an inspector knows that the bolt is fully engaged. If, on the other hand, the bolt is not fully engaged, the pin will not protrude the predetermined distance out of the bolt. A second embodiment of the similar invention is a stud having an indicator pin. In third and fourth embodiments, the bolts and studs have indicator pins including grease zerks. These grease zerks allow the holes to be filled with grease to prevent damage to the hole due to corrosion.
Claims25
A bolt means comprising:
- (a) a shaft means having a first end, a second end, and a length;
- (b) thread means on the shaft means for engaging a threaded opening having threads, a first, open end and a second, closed end;
- (c) indicator means in the shaft means for indicating when the threads of the threaded opening are fully engaged by the indicator means includes a longitudinal bore in the shaft means having an indicator pin slidingly received therein;
- the indicator pin has an end having a diameter smaller than that of the longitudinal bore to allow the pin to slide into and out of the bore from an end of the bore.
A threaded fastener comprising:
- (a) a shaft having a first end, a second end, and a length;
- (b) threads for engaging a threaded opening having a first, open end and a second, closed end;
- (c) a longitudinal bore in the shaft;
- (d) an indicator pin for indicating when the second end of the shaft of the threaded fastener engages the second end of the threaded opening, the indicator pin being slidingly received in the bore and having a length greater than the length of the shaft the indicator pin has an end having a diameter smaller than that of the longitudinal bore to allow the pin to slide into and out of the bore from an end of the bore.
A threaded fastener comprising:
- (a) a shaft having a first end, a second end, and a length;
- (b) threads on the shaft for engaging a threaded opening having a first, open end and a second, closed end;
- (c) a longitudinal bore in the shaft;
- (d) an indicator pin for indicating when the threads of the threaded opening are fully engaged by threads on the shaft, the indicator pin being slidingly received in the bore and having a length greater than the length of the shaft the indicator pin has an end having a diameter smaller than that of the longitudinal bore to allow the pin to slide into and out of the bore from an end of the bore.
Dependencies are inferred from the claim text.